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Spiders are quite literally all around us. A recent entomological survey of North Carolina homes turned up spiders in 100 percent of them, including 68 percent of bathrooms and more than three-quarters of bedrooms. There's a good chance at least one spider is staring at you right now, sizing you up from a darkened corner of the room, eight eyes glistening in the shadows.
Spiders mostly eat insects, although some of the larger species have been known to snack on lizards, birds and even small mammals. Given their abundance and the voraciousness of their appetites, two European biologists recently wondered: If you were to tally up all the food eaten by the world's entire spider population in a single year, how much would it be?
Martin Nyffeler and Klaus Birkhofer published their estimate in the journal the Science of Nature earlier this month, and the number they arrived at is frankly shocking: The world's spiders consume somewhere between 400 million and 800 million tons of prey in any given year. That means that spiders eat at least as much meat as all 7 billion humans on the planet combined, who the authors note consume about 400 million tons of meat and fish each year.
Or, for a slightly more disturbing comparison: The total biomass of all adult humans on Earth is estimated to be 287 million tons. Even if you tack on another 70 million-ish tons to account for the weight of kids, it's still not equal to the total amount of food eaten by spiders in a given year, exceeding the total weight of humanity.
These numbers yielded some interesting factoids on their own. For instance, one study estimated that global average spider density stands at about 131 spiders per square meter. Some habitats, like deserts and tundra, are home to fewer spiders. On the other hand, spider densities of 1,000 or more individuals per square meter have been observed under certain “favorable” conditions — since Nyffler and Birkhofer don't define what “favorable” means in this context, I'm going to assume it refers to dark, dusty places like the area under my bed.
The apparent tendency to hide in banana bunches – like in the latest incident – has given them the nickname “banana spider”. Their scientific name translates as “murderess” in Greek and they are also known as the “armed spider”, because of their unusual attacking stance, and “horse stinger”.
How deadly is this breed? The Guinness Book of World Records has named it the most venomous spider in the world for possessing the most active neurotoxic venom of any living spider.
originally posted by: Irishhaf
Before I moved I had a jumping spider that hung out under my computer desk, every time I played music he would come out and kind of bounce up and down to the vibrations right next to my speakers.
He seemed to enjoy it... and knew to hide when the cats were around, was a tad creepy at first but he never bothered me and helped keep the bad ones out.
originally posted by: AugustusMasonicus
a reply to: Krazysh0t
Thanks dude. Hold that thought, I'm just going to get some gasoline and a match for your thread.
Maybe your next thread can be about clowns.